Definition and Frequency of Recurrent Miscarriages

n the case of a history of 2 or more miscarriages, premature births and still-births, then that will be considered a recurrent miscarriage and there is said to be about 80,000 people per year suffering from that. Additionally, if it is 3 or more times, it is called Habitual Miscarriages, and is thought as a synonym. In Japan, it is reported that the frequency of Non Developing Syndrome is about 6%, and the frequency for recurring miscarriages is about 1.5% (Sugiura-Ogasawara M, et al. Live birth rate according to maternal age and previous number of recurrent miscarriages. Am J Reprod Immunol 2009; 62: 314-319.).
As for chemical pregnancies, the number of miscarriages is not included; however in the case of repetition we recommend to have it looked at as if it were a recurrent miscarriage.

Implantation Progress

Beginning of implantation

Submerge

Hormone secretion

Pregnancy reaction

Completion of implantation

As for implantation, it starts when the fertilized egg's embryo is attached to the endometrial epithelial cells. The fertilized egg will immediately submerge itself into the endometrium. From this stage, the pregnancy will be established.